Koni vs. Nismo s tune
 

Im looking to do suspention, how is koni shocks with either hotchkis, or eibach pro kit springs, compaired to nismo s-tune does anyone know stiffness and handling wize whats better, or have any other cheap solution.. Its a street car that i drive very fast and do a good amount of track days with...

I would highly recommend the Konis with a linear spring setup.

which springs would they be, ok so i have Rota P45r (265/35/18---285/35/18)

And a front lip(worried about scraping) what springs would you recomend.

Koni's with mild drop amounts or enough spring rate to keep you off the bump stops if your going lower then .8" such as at least 560lbs (I had them with 448lbs).

We do have couple of board members with TomMotor sport coilover springs and Tokico D-specs, that would get you decent linear spring rates and adjustable shocks (compression AND rebound).

http://www.thezstore.com/store/merch...ry_Code=PSDC14

http://cgi.ebay.com/ebaymotors/03-04...spagenameZWDVW
Ad has expired but you get the idea.

Here is how your choices stack up against one another.

Unless you make a diffferent product choice, your other choices won't measure up to the S-tune setup, Koni valving will be better but spring rates aren't as aggressive.

Eibach 350Z progressive springs 1”/1” drop
Spring rates in LBS initial/final front 296/384 initial/final rear 316/421

Hotchkis 350Z Linear springs .6”/.8”
Spring rates in lbs 340/330

Nismo S-tune (twin tube construction, uses progressive springs)
350Z .8"/.8" drop
Spring rates 448/504

What springs did you have that were 448lbs? Thanks,

That's the custom setup I did with Koni motorsport coilover parts for the fronts, Tein tapered 448lbs springs on a 6061 alumunum adaptor ring I made. For the rear I tried oem 427lbs springs, 375lbs Tein H-tech and 342lbs oem's.

http://pics.montypics.com/gcoupe35/2...r1_040_18a.jpg

http://pics.montypics.com/gcoupe35/2...r1_058_27a.jpg